4/21/2023 0 Comments Sip dtmf![]() The red keys in the fourth column produce the A, B, C, and D DTMF events.ĭual-tone multi-frequency signaling ( DTMF) is a telecommunication signaling system using the voice-frequency band over telephone lines between telephone equipment and other communications devices and switching centers. Autovon keypads were one of the few production units to include all 16 DTMF signals.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |